Drought resistance of Ailanthus altissima (Mill.) Swingle is a major factor underlying the impressively wide expansion of this species in Europe and North America. We studied the specific mechanism used by A. altissima to withstand drought by subjecting potted seedlings to four irrigation regimes. At the end of the 13-week treatment period, soil water potential was -0.05 MPa for well-watered co...

The influence of individual or combined treatments of the chloroacetanilide herbicide preti­ lachlor and the safener fenclorim on glutathione content and the activity of glutathione reduc­ tase (GR, EC 1.6.4.2) and glutathione-S-transferase (GST, EC 2.5.1.18) of rice (O ryza sativa L., var. Lamont) was investigated in a time-course study including 0, 12, 24, 48, and 72 h peri­ ods after treatme...

This study aimed to estimate the production of seeds per umbel and assess both effect gibberellic acid (GA3) order on seed germination in Amazon chicory species. The experiment was conducted two steps. Firstly, traits related were evaluated. Afterward, a test carried out, following parameters assessed: speed index (GSI), average time (AGT), percentage (%G), abnormal seedlings (%AS), non-germina...

Abstract Essential oils from the stems and leaves of Croton doctoris were analyzed by gas chromatography mass spectrometry, resulting in 22 identified compounds. The effects these essential on germination, root shoot growth, total chlorophyll content, potential respiration, peroxidase activity, catalase, superoxide dismutase, mitotic index lettuce onion determined. Antioxidant, antimicrobial, c...

Vesicular-arbuscular mycorrhizal (M) fungal colonization, growth, and nonstructural carbohydrate status of sour orange (Citrus aurantium L.) seedlings were compared at low- and high-phosphorus (P) supply following inoculation with four Glomus isolates: G. intraradices (Gi, FL208), G. etunicatum (Ge, UT316), G. claroideum (Gc, SC186), and Glomus sp. (G329, FL906). Nonmycorrhizal (NM) seedlings s...

Most fruit-tree breeding projects are based on selection of seedlings in regard to their performance. The selected seedlings are vegetatively propagated, usually by grafting. It is highly important for the breeder to know whether the performance of the grafted tree will resemble the performance of the original seedling. In this study the performance of avocado and mango seedlings was compared w...

Basal stem rot symptoms were found on blueberry seedlings imported from the United States of America in 2008. The fungus obtained from the diseased seedlings was identified as Calonectria colhounii based on morphological and molecular characteristics. The consignments of the blueberry seedlings infected with C. colhounii were destroyed to prevent introduction of the fungus to Korea.

Fertilization at planting with GromaxTM teabags did not affect survival of Douglas-fir, Engelmann spruce or lodgepole pine seedlings. Fertilized seedlings were taller and had larger stem diameters in the second year after planting, but this effect had disappeared by year five. In year nine, the proportion of seedlings that had reached free growing was similar in fertilized and unfertilized trea...

a semi-automatic 9-row transplanter for bare root seedlings has recently been developed at the isfahan center for agricultural research that plants 80 seedlings/m2 using 9 operators at a capacity of 0.3 ha/d (8 h). separating a single seedling from a bunch and dropping it into a distributer cell by hand takes 1 s on average. at a density of 700-800 thousand/ha, the travel speed should not excee...

Seedling abnormalities are a common problem in micropropagation and require investigation. This study aimed to assess the growth characteristics morphoanatomy of stem apices nodal segments basil (Ocimum basilicum) ‘Dark Opal’ inoculated medium containing combinations 6-benzylaminopurine (BAP) naphthaleneacetic acid (NAA). Presence calluses, adventitious roots, abnormal seedlings was quantified ...